Two small-time criminals, Libano and Freddo, team up to kidnap a wealthy baron. With the ransom money, the leaders of the two gangs plan a partnership that will conquer Rome: the Gang is born.

Libano and the others, all in prison, wonder who could have betrayed them. The answer is simple: there can only be one man behind the unscrupulous Scialoja's move. But their hegemony continues even from behind bars.

The police raid Patrizia's brothel and arrest her. During the search, Scialoja uncovers a crucial clue to the possible collusion between the secret services and the gang. Meanwhile, Dandi is torn between remaining loyal to his comrades or forming an alliance with Sardo.